<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link href="../static/bootstrap.min.css" rel="stylesheet">
    <script src="../static/jquery.min.js"></script>
    <script src="../static/bootstrap.min.js"></script>
    <style>
        .container .row div {
            height: 40px;
            background-color: #dedef8;
            margin: 1px;
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="row">
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
            <div class="col-xs-1"></div>
        </div>
        <div class="row">
            <div class="col-xs-4"></div>
            <div class="col-xs-4"></div>
            <div class="col-xs-4"></div>
        </div>
    </div>
</body>

</html>